Question

It is generally observed that after doing a strenuous physical activity our
breathing rate increases. What could be the reason behind it?
a)To fulfil the increased demand for water by the body
b) To fulfil the increased demand for oxygen by the body
c) To fulfil the increased demand for energy by the body
d) To fulfil the increased demand for carbon dioxide by the body​

Answer 1

Even though c seems right i think b is more correct because "after" a strenous our body uses oxygen more for breaking down accumulated lactic acid than releasing energy.